yes but it doesn't say they didn't make it in Persia...
if you look at the structure of the crucible steels ... specially the waterings... they tell you there are some big differences in the process... .. Large waterings take much slower cooling times from liquid to solid... and need a long roast afterwards... .. small waterings require a much much shorter cool time and roast...
in my experience..... you can't take a short cool ingot and turn it into a large watering slow cool ingot...
i'd like to take my saturn and turn it into a Mercedes benz ... but it doesn't work that way...
Greg